Carburetor connection



March 9, 1937. w. B. LEE 2,072,893

GARBURETOR CONNECTION Filed Nov. 17, 1934 INVENTOR. WILLIAM 8. LEE.

ATTORNEY Patented Mar. 9, 1937 NHTED STATES PATENT @FFICE CARBURETORCONNECTION George W. Rock Application November 17, 1934, Serial No.753,471

7 Claims.

The invention relates to a device for connecting a carburetor to thefuel intake manifold of an internal combustion engine.

An object of the invention is to provide for the operative associationof a carburetor with a manifold for which it was not specificallydesigned to be associated.

Another object is to provide a connection which permits a variableangular adjustment of a carburetor in its mounted position and withrespect to an engine with which it is associated.

A further object is to provide a connector having an appropriatelytapered bore for smoothly connecting carburetor and manifold ducts ofdifferent sizes.

An added object is to provide a connector unit which is generallyadapted for universal installation as an adapter connector for themounting of carburetors.

The invention possesses other objects and features of advantage, some ofwhich, with the foregoing, will be set forth or be apparent in thefollowing description of a typical embodiment of the device, and in theaccompanying drawing, in 25 which,

Figure 1 is an elevation showing a carburetor mounted onan intakemanifold for an internal combustion engine by the use of a connectorunit embodying the invention.

Figure 2 is an enlarged fragmentary vertical section of the connectorand portions of the carburetor and manifold.

Figure 3 is a plan view of the connector unit having its parts arrangedas in Figure 1, a portion 35 of the structure being broken out to theplane of the line 3-3 in Figure 2.

Figure 4 is an elevation of the unit, a throatpiece thereof being shownas axially removed from the remainder of the assembly.

As is particularly illustrated, the features of present invention areincorporated in the structure of a connector 6 by which a carburetor 1is supportedly and removably mounted on an intake manifold 8 for aninternal combustion engine (not shown).

The manifold 8 includes a usual fuel-receiving nozzle portion 9 having ausual oval flange H at its free end. The flange H is provided with boltholes 12 at its opposite ends, and the nozzle 9 has a bore I 3terminating at the lower flange face. In the present instance, thecarburetor l is of the up-draft type, provides an upwardly directeddischarge nozzle portion Hi, and is formed with a usual oval flange itat its free end. The flange 55 i6 is provided with threaded holes I! forreceiving the usual stud bolts by which the carburetor may be directlyfixed to a cooperating flange of an intake manifold for which it hasbeen designed.

It will now be noted that it is often found desirable to associatecarburetors with intake manifolds with which they were not originallyintended to be used, and the present connection means has beenparticularly designed to facilitate such an association. In the presentinstance, the manifold flange II is transverse to the carburetor flangeI6, and the manifold bore 13 is larger than the carburetor nozzle boreI5; under these circumstances, it will be understood that a directconnection of the flanges II and i6 would not be feasible while thecarburetor is in the disclosed relation to the manifold.

By reference to the structure of the unit 6, the same is seen toessentially comprise flanges I8 and I9 engaging a nipple or sleevemember 2|. As particularly illustrated and brought out in Figure 2, oneend of the member 2! is flxed within the bore of the flange member l9 toextend axially therefrom; in the present instance, said nipple has aradial rib 22 at one end, and the member l9 has been cast about thenipple end at the rib 22 for effecting a fixed and unitary associationof the member and nipple. The flange member 19 is provided with boltholes 23 which are diametrically opposite each other and preferablycomprise radial slots for facilitating the mounting of this member oncarburetor nozzle flanges having differently spaced bolt holes H; as isshown in Figures 2 and 3, stud bolts 24 are engaged through the slots 23and in the holes I! of the flange iii, a usual sealing gasket 25 beinginterposed between the flanges.

At its outer end, the nipple member 2| is provided with a radial flange26 which is arranged to engage in a complementary annular seat 27 whichis provided in the flat outer face 28 of the flange member l8. Thelatter member is freely rotatable about the nipple 2i, and when theflange 26 is engaged in the seat 21 the flange preferably protrudesslightly from the face 28 of the flange member, as is illustrated. Theflange I8 is provided with bolt holes 29 in the form or radial slot; asshown in Figure 1, bolts 3| are engaged through the bolt holes 29 of themember I8 and the bolt holes 12 of the manifold flange H for securingthe member to the manifold.

A relatively thick sealing gasket 32 of somewhat yielding material isengaged between the flanges 26 and H whereby a tightening of the bolts3| is arranged to sealedly engage the gasket between the said flangesand at the same time engage the nipple 2! against rotation in the flangemember E8, the latter by reason of the forcible engagement of the nippleflange 26 with the flange l8. In this manner, a carburetor mounted onthe flange l9 may be fixed in rotatably adjustedrelation to the manifoldportion 9 and to the engine whereby the controls forthe carburetor mayextend therefrom as required. It will be understood that until the boltsiii are tightened to forcibly engage the nipple flange 26 between thegasket 32 and the member IS, a swivel joint is provided between thenipple and member. Aside from the question of relative rotativeadjustment of the flanges, it will be noted that the provision of thedescribed swivel mounting of one flange permits the provision and use ofparticularly short adapter connectors through facilitating the mountingof the securing bolts in their operative positions.

When, as in the present instance, the manifold bore l3 and thecarburetor bore l5 are of diiferent size, the bore of the unit 6 ispreferably tapered from one size to the other to provide a smoothconnection between the carburetor and manifold bores. In order that thepresent connector may be most universally used, the bore of the nipple2! may be uniform and said nipple may, as required, appropriatelyreceive a throat or lining member 33 which itself provides a bore 34which is formed to effect the desired smooth connection between theconnected carburetor and manifold bores of different sizes.

The throat member 33is preferably of a proper length for fixedengagement by and between the "gaskets 25 and 33, and different suchmembers may be readily and inexpensively provided for use with a givenunit to fit different carburetor and manifold bore combinations, itbeing understood that the bore of the nipple 2| is preferably .nosmaller than the larger of the two bores to be connected. Furthermore,it will be understood that one or both of the bores to be connectedmayhave other than circular cross-sections, and that the bore of a member33 may provide the desired transition from one shape and/or size to theother.

While the present embodiment of the connector 6 is particularly shown asapplied as a supporting hanger between a carburetor and manifold inwhich the manifold inlet bore is larger than the carburetor bore, itwill be understood that in some instances the manifold nozzle bore mightbe the smaller; under the latter circumstances, the appropriate member33 would be reversed in its mounting or the connector would itself beinstalled in a reverse position to that particularly shown. If thenozzle bores to be connected are alike, it will be noted that a unithaving a nipple of like bore might be used, or that a throat memberhaving a uniform bore might be provided within the bore of a largernipple member.

Although the present adapter connector is particularly disclosed as inuse for mounting an up-draft carburetor on an intake manifold, it willbe understood that such an adapter may be as readily applied insupportedly mounting a down-draft carburetor on a manifold and indesired rotative adjustment with respect thereto and to the engine withwhich it may be used.

From the foregoing description taken in connection with the accompanyingdrawing, the advantages of the construction and method of use will bereadily understood by those skilled in the art to which the presentinvention appertains. While I have described the features and principleof operation of a device which I now consider to be a preferredembodiment of my invention, I

desire to have it understood that the showing is primarily illustrative,and that such changes may be made, when desired, as fall within thescope of the following claims.

1. In means for connecting a tubular discharge nozzle of a fuelcarburetor with a tubular receiving nozzle for the fuel intake passageof an internal combustion engine for mutual rotative adjustment, saidnozzles being provided with terminal radial flanges fixedly relatedthereto, a connector means comprising a nipple for connecting the ductsof said nozzles, and radial flanges mounted on said nipple for fixed andsealed connection with the opposed flanges of the different said nozzlesto lock the nipple and nozzles against relative rotation, one of saidconnector flanges being swivelled to said nipple for rotative adjustmentwith respect to the other connector flange whereby; the mountedcarburetor may be rotatively'adjusted to any desired degree with respectto the said receiving nozzle.

2. A structure in accordance with claim 1 wherein the various flangesare each provided with a pair of diametrically opposed and axiallydirected bolt holes for receiving bolts as the sole securing means forthe connector, said holes being of oval cross-section and having theirgreatest widths in their diametric line.

3. A structure in accordance with claim 1 wherein the nipple extremityat the swivelled flange extends axially outwardly of the latter flangeand a sealing gasket is engaged between said nipple extremity and thenozzle flange with tremities and having bores of different sizes, a1

nipple for connecting the bores of the nozzles and provided with flangesat its extremities for fixedly mounting the nipple on and between thenozzle flanges, and a tubular throat member lining the nipple bore andproviding a tapered bore having its different end portions ofsubstantially the same size as the different nozzle bores whereby toprovide a smooth connection between said nozzle bores when the nipple isoperatively installed between the nozzles.

5. A structure in accordance with claim 4 wherein the throat member isremovably engaged in the nipple and is arranged for fixed engagement byand between the nozzle flanges as the sole securing means longitudinallythereof.

nozzle of a fuel carburetor with a tubular receiving nozzle for thecarburetted fuel, said nozzles having bores of different sizes, a nipplefor connecting the bores of the nozzles, means to connect the nippleextremities with the nozzles for fixedly and sealedly mounting thenipple on and between the nozzles, and a tubular throat member liningthe nipple bore and providing a tapered bore having its different endportions of substantially the same size as the different nozzle boreswhereby to provide a smooth connection between said nozzle bores whenthe nipple is operatively installed between the nozzles.

-60 6. In means for connecting a tubular discharge.

'7. In means for connecting a tubular discharge nozzle of a fuelcarburetor with a tubular receiving nozzle in rotatively adjustedrelation thereto, said nozzles being provided with terminal radialflanges fixedly related thereto, a connector comprising a nipple forconnecting the ducts oi said nozzles, a radial connector flange fixed toan end of said nipple for use in fixing the same to a said nozzleflange, a radial flange fixed at the other nipple end, a connectorflange encircling said nipple for rotative adjustment thereabout andarranged to be fixed to the second nozzle flange, said last connectorflange being disposed between the nipple flanges, and said lastconnector flange and the second nozzle flange being cooperative tosealedly clamp the second nipple flange between them.

WILLIAM B. LEE.

